Yasuda Tomohiro, Fukumura Kazuya, Uchida Yusuke, Koshi Hitomi, Iida Haruko, Masamune Ken, Yamasoba Tatsuya, Sato Yoshiaki, Nakajima Toshiaki
Department of Ischemic Circulatory Physiology, Graduate School of Medicine,
Department of Ischemic Circulatory Physiology, Graduate School of Medicine.
J Gerontol A Biol Sci Med Sci. 2015 Aug;70(8):950-8. doi: 10.1093/gerona/glu084. Epub 2014 Jun 10.
We examined the effect of low-load, elastic band resistance training with blood flow restriction (BFR) on muscle size and arterial stiffness in older adults. Healthy older adults (aged 61-85 years) were divided into BFR training (BFR-T, n = 9) or non-BFR training (CON-T, n = 8) groups. Both groups performed low-load arm curl and triceps down exercises (four sets, total 75 repetitions for each) using an elastic band, 2 d/wk for 12 weeks. The BFR-T group wore inflated pneumatic elastic cuffs (120-270 mm Hg) on both arms during training. Magnetic resonance imaging-measured muscle cross-sectional area of the upper arm, maximum voluntary isometric contraction of the elbow flexors and extensors, cardio-ankle vascular index testing, and ankle-brachial pressure index were measured before and 3-5 days after the final training session. Muscle cross-sectional area of the elbow flexors (17.6%) and extensors (17.4%) increased, as did elbow flexion and elbow extension maximum voluntary isometric contraction (7.8% and 16.1%, respectively) improved (p < .05) in the BFR-T group, but not in the CON-T group. In cardio-ankle vascular index and ankle-brachial pressure index testing, there were no changes between pre- and post-results in either group. In conclusion, elastic band BFR-T improves muscle cross-sectional area as well as maximal muscle strength but does not negatively affect arterial stiffness in older adults.
我们研究了低负荷、带血流限制（BFR）的弹力带抗阻训练对老年人肌肉大小和动脉僵硬度的影响。健康老年人（年龄61 - 85岁）被分为BFR训练组（BFR-T，n = 9）或非BFR训练组（CON-T，n = 8）。两组均使用弹力带进行低负荷弯举和肱三头肌下压练习（四组，每组共75次重复），每周2天，共12周。BFR-T组在训练期间双臂佩戴充气式气动弹力袖带（120 - 270毫米汞柱）。在最后一次训练前及训练后3 - 5天测量上臂磁共振成像测定的肌肉横截面积、肘屈肌和伸肌的最大自主等长收缩、心踝血管指数测试以及踝臂压力指数。BFR-T组的肘屈肌（17.6%）和伸肌（17.4%）的肌肉横截面积增加，肘屈和肘伸的最大自主等长收缩也有所改善（分别为7.8%和16.1%）（p < 0.05），而CON-T组则无变化。在心踝血管指数和踝臂压力指数测试中，两组前后结果均无变化。总之，弹力带BFR-T训练可改善老年人的肌肉横截面积以及最大肌肉力量，但对动脉僵硬度无负面影响。
